diff --git a/layers/transportation_name/layer.sql b/layers/transportation_name/layer.sql
index de1d55fa..a2a619f0 100644
--- a/layers/transportation_name/layer.sql
+++ b/layers/transportation_name/layer.sql
@@ -18,9 +18,14 @@ RETURNS TABLE(osm_id bigint, geometry geometry, name text, name_en text, ref tex
       highway_class(highway) AS class
     FROM (
 
-        -- etldoc: osm_transportation_name_linestring_gen3 ->  layer_transportation_name:z8
+        -- etldoc: osm_transportation_name_linestring_gen4 ->  layer_transportation_name:z6
+        SELECT * FROM osm_transportation_name_linestring_gen4
+        WHERE zoom_level = 6
+        UNION ALL
+
+        -- etldoc: osm_transportation_name_linestring_gen3 ->  layer_transportation_name:z7z8
         SELECT * FROM osm_transportation_name_linestring_gen3
-        WHERE zoom_level = 8
+        WHERE zoom_level BETWEEN 7 AND 8
         UNION ALL
 
         -- etldoc: osm_transportation_name_linestring_gen2 ->  layer_transportation_name:z9
diff --git a/layers/transportation_name/merge_highways.sql b/layers/transportation_name/merge_highways.sql
index 0e7c8f74..6cdb50a6 100644
--- a/layers/transportation_name/merge_highways.sql
+++ b/layers/transportation_name/merge_highways.sql
@@ -80,12 +80,20 @@ CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen2_geometry_idx
 
 -- etldoc: osm_transportation_name_linestring_gen2 -> osm_transportation_name_linestring_gen3
 CREATE MATERIALIZED VIEW osm_transportation_name_linestring_gen3 AS (
-    SELECT ST_Simplify(geometry, 120) AS geometry, osm_id, member_osm_ids, name, name_en, ref, highway, network, z_order
+    SELECT ST_Simplify(geometry, 200) AS geometry, osm_id, member_osm_ids, name, name_en, ref, highway, network, z_order
     FROM osm_transportation_name_linestring_gen2
     WHERE highway = 'motorway' AND ST_Length(geometry) > 20000
 );
 CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen3_geometry_idx ON osm_transportation_name_linestring_gen3 USING gist(geometry);
 
+-- etldoc: osm_transportation_name_linestring_gen3 -> osm_transportation_name_linestring_gen4
+CREATE MATERIALIZED VIEW osm_transportation_name_linestring_gen4 AS (
+    SELECT ST_Simplify(geometry, 500) AS geometry, osm_id, member_osm_ids, name, name_en, ref, highway, network, z_order
+    FROM osm_transportation_name_linestring_gen3
+    WHERE highway = 'motorway' AND ST_Length(geometry) > 20000
+);
+CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen4_geometry_idx ON osm_transportation_name_linestring_gen4 USING gist(geometry);
+
 -- Handle updates
 
 CREATE SCHEMA IF NOT EXISTS transportation_name;
@@ -106,6 +114,7 @@ CREATE OR REPLACE FUNCTION transportation_name.refresh() RETURNS trigger AS
     REFRESH MATERIALIZED VIEW osm_transportation_name_linestring_gen1;
     REFRESH MATERIALIZED VIEW osm_transportation_name_linestring_gen2;
     REFRESH MATERIALIZED VIEW osm_transportation_name_linestring_gen3;
+    REFRESH MATERIALIZED VIEW osm_transportation_name_linestring_gen4;
     DELETE FROM transportation_name.updates;
     RETURN null;
   END;
diff --git a/layers/transportation_name/network_type.sql b/layers/transportation_name/network_type.sql
index 238b4c81..af61517d 100644
--- a/layers/transportation_name/network_type.sql
+++ b/layers/transportation_name/network_type.sql
@@ -3,6 +3,7 @@ DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring CASCADE;
 DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen1 CASCADE;
 DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen2 CASCADE;
 DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen3 CASCADE;
+DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen4 CASCADE;
 
 DO $$
 BEGIN
diff --git a/layers/transportation_name/tmp.sql b/layers/transportation_name/tmp.sql
new file mode 100644
index 00000000..8485d7f5
--- /dev/null
+++ b/layers/transportation_name/tmp.sql
@@ -0,0 +1,138 @@
+select ref, highway, network,
+    case
+      when network is not null
+        then network::text
+      when length(coalesce(ref, ''))>0
+        then 'motorway'
+    end as shield
+from osm_transportation_name_linestring;
+
+
+
+SELECT
+    rm.network,
+    rm.ref::text as network_ref,
+    hl.ref as road_ref,
+    hl.highway,
+    ROW_NUMBER() OVER(PARTITION BY hl.osm_id
+                                 ORDER BY rm.network) AS "rank"
+FROM osm_highway_linestring hl
+left join osm_route_member rm on (rm.member = hl.osm_id)
+;
+
+select network, count(*)
+from osm_route_member
+group by network;
+
+select network, ref, count(*)
+from osm_route_member
+group by network, ref
+order by network, ref;
+
+select *
+from osm_route_member
+where ref::int < 3;
+
+
+select ref, network, name, count(*)
+from osm_route_member
+where name like '%Trans-Canada Highway%'
+group by ref, network, name;
+
+
+select ref, count(*)
+from osm_highway_linestring
+group by (ref)
+order by count(*) desc;
+
+select ref, highway, count(*)
+from osm_highway_linestring
+where length(ref)>0
+and ref like 'A%' or ref like 'M%'
+group by ref, highway
+order by count(*) desc;
+
+select ref, count(*)
+from osm_highway_linestring
+where length(ref)>0
+and ref like 'A%' or ref like 'M%'
+group by ref
+order by count(*) desc;
+
+
+select ref, count(*)
+from osm_highway_linestring
+where length(ref)>0
+and highway = 'motorway'
+group by ref
+order by count(*) desc;
+
+select count(hw.*)
+from osm_highway_linestring hw CROSS JOIN ne_10m_admin_0_countries c
+where c.iso_a2 = 'GB'
+AND ST_Intersects(hw.geometry, c.geometry);
+
+select hw.osm_id, hw.name, hw.ref
+from osm_highway_linestring hw CROSS JOIN ne_10m_admin_0_countries c
+where c.iso_a2 = 'GB'
+AND not ST_Intersects(hw.geometry, c.geometry);
+
+
+
+select count(*)
+from osm_highway_linestring;
+
+
+select * from ne_10m_admin_0_countries;
+select name, ST_GeometryType(geometry) from ne_10m_admin_0_countries where iso_a2 = 'GB';
+select geometry from ne_10m_admin_0_countries where iso_a2 = 'GB';
+
+
+with gb_geom as (select geometry from ne_10m_admin_0_countries where iso_a2 = 'GB')
+  select hw.osm_id, hw.name, hw.ref
+  from osm_highway_linestring hw
+  where not ST_Intersects(hw.geometry, gb_geom);
+
+
+DO $$
+DECLARE gbr_geom geometry;
+BEGIN
+  select geometry into gbr_geom from ne_10m_admin_0_countries where iso_a2 = 'GB';
+  select hw.osm_id, hw.name, hw.ref
+  from osm_highway_linestring hw
+  where not ST_Intersects(hw.geometry, gbr_geom);
+  -- ...
+END $$;
+
+
+DO $$
+DECLARE gbr_geom geometry;
+BEGIN
+  select st_buffer(geometry, 1000) into gbr_geom from ne_10m_admin_0_countries where iso_a2 = 'GB';
+  delete from osm_route_member where network IN('omt-gb-motorway', 'omt-gb-trunk');
+
+  insert into osm_route_member (member, ref, network)
+    (
+      SELECT hw.osm_id, substring(hw.ref from E'^[AM][0-9AM()]+'), 'omt-gb-motorway'
+      from osm_highway_linestring hw
+      where length(hw.ref)>0 and ST_Intersects(hw.geometry, gbr_geom)
+        and hw.highway IN ('motorway')
+    ) UNION (
+      SELECT hw.osm_id, substring(hw.ref from E'^[AM][0-9AM()]+'), 'omt-gb-trunk'
+      from osm_highway_linestring hw
+      where length(hw.ref)>0
+        and hw.highway IN ('trunk')
+    )
+  ;
+END $$;
+
+
+SELECT hw.osm_id, hw.ref, substring(hw.ref from E'^[AM][0-9AM()]+'), 'omt-gb-motorway'
+from osm_highway_linestring hw
+where length(hw.ref)>0
+  and hw.highway IN ('motorway');
+
+  SELECT hw.osm_id, hw.ref, substring(hw.ref from E'^[AM][0-9AM()]+'), 'omt-gb-trunk'
+  from osm_highway_linestring hw
+  where length(hw.ref)>0
+    and hw.highway IN ('trunk');
diff --git a/layers/transportation_name/transportation_name.yaml b/layers/transportation_name/transportation_name.yaml
index d7a015c0..f1e679ba 100644
--- a/layers/transportation_name/transportation_name.yaml
+++ b/layers/transportation_name/transportation_name.yaml
@@ -10,9 +10,22 @@ layer:
   fields:
     name: The OSM [`name`](http://wiki.openstreetmap.org/wiki/Highways#Names_and_references) value of the highway.
     name_en: The english `name:en` value if available.
-    ref: The OSM [`ref`](http://wiki.openstreetmap.org/wiki/Key:ref) tag of the motorway or road.
+    ref: The OSM [`ref`](http://wiki.openstreetmap.org/wiki/Key:ref) tag of the motorway or its network.
     ref_length: Length of the `ref` field. Useful for having a shield icon as background for labeling motorways.
-    network: The network type derived from [`network`](http://wiki.openstreetmap.org/wiki/Key:network) tag of the road.
+    network:
+      description: |
+          The network type derived mainly from [`network`](http://wiki.openstreetmap.org/wiki/Key:network) tag of the road.
+          See more info about [`us-*`](http://wiki.openstreetmap.org/wiki/Road_signs_in_the_United_States),
+          [`ca-transcanada`](https://en.wikipedia.org/wiki/Trans-Canada_Highway),
+          or [`gb-*`](http://wiki.openstreetmap.org/wiki/United_Kingdom_Tagging_Guidelines#UK_roads).
+      values:
+      - us-interstate
+      - us-highway
+      - us-state
+      - ca-transcanada
+      - gb-motorway
+      - gb-trunk
+      - motorway (default)
     class:
       description: |
           Distinguish between more and less important roads.